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Fan motor

(1997 Lexus ES300)
in Belton, SC on December 15, 2010
my heater fan is stuck on this a bad relay? how doi checkit?
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Popular Answer
If the fan comes on at all, then the realy is good. The fan speed is controlled by a transistorized controller (called a "linear controller") which is controlled by the A/C control assembly. The diagnostics are not really simple and would require a good understanding of these types of systems and good diagnostic/ repair info. Generally this would be a job for a technicain with good diagnostic skills.
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